Merge branch 'net-dsa-mv88e6xxx-remove-some-6250-specific-methods'

Rasmus Villemoes says:

====================
net: dsa: mv88e6xxx: remove some 6250-specific methods

v2:
 - resend now that the bug-fix patch (87fe0436, "net: dsa:
   mv88e6xxx: also read STU state in mv88e6250_g1_vtu_getnext") is in
   net and also merged to net-next.
 - include various tags in patch 1.
 - add second similar patch for loadpurge.
====================

Link: https://lore.kernel.org/r/20210125150449.115032-1-rasmus.villemoes@prevas.dkSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -4049,8 +4049,8 @@ static const struct mv88e6xxx_ops mv88e6250_ops = {
 	.mgmt_rsvd2cpu = mv88e6352_g2_mgmt_rsvd2cpu,
 	.pot_clear = mv88e6xxx_g2_pot_clear,
 	.reset = mv88e6250_g1_reset,
-	.vtu_getnext = mv88e6250_g1_vtu_getnext,
-	.vtu_loadpurge = mv88e6250_g1_vtu_loadpurge,
+	.vtu_getnext = mv88e6185_g1_vtu_getnext,
+	.vtu_loadpurge = mv88e6185_g1_vtu_loadpurge,
 	.avb_ops = &mv88e6352_avb_ops,
 	.ptp_ops = &mv88e6250_ptp_ops,
 	.phylink_validate = mv88e6065_phylink_validate,

drivers/net/dsa/mv88e6xxx/global1.h

@@ -336,10 +336,6 @@ int mv88e6185_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
 			     struct mv88e6xxx_vtu_entry *entry);
 int mv88e6185_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
 			       struct mv88e6xxx_vtu_entry *entry);
-int mv88e6250_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
-			     struct mv88e6xxx_vtu_entry *entry);
-int mv88e6250_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
-			       struct mv88e6xxx_vtu_entry *entry);
 int mv88e6352_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
 			     struct mv88e6xxx_vtu_entry *entry);
 int mv88e6352_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,

drivers/net/dsa/mv88e6xxx/global1_vtu.c

@@ -336,39 +336,6 @@ int mv88e6xxx_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
 	return mv88e6xxx_g1_vtu_vid_read(chip, entry);
 }
 
-int mv88e6250_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
-			     struct mv88e6xxx_vtu_entry *entry)
-{
-	u16 val;
-	int err;
-
-	err = mv88e6xxx_g1_vtu_getnext(chip, entry);
-	if (err)
-		return err;
-
-	if (entry->valid) {
-		err = mv88e6185_g1_vtu_data_read(chip, entry);
-		if (err)
-			return err;
-
-		err = mv88e6185_g1_stu_data_read(chip, entry);
-		if (err)
-			return err;
-
-		/* VTU DBNum[3:0] are located in VTU Operation 3:0
-		 * VTU DBNum[5:4] are located in VTU Operation 9:8
-		 */
-		err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_OP, &val);
-		if (err)
-			return err;
-
-		entry->fid = val & 0x000f;
-		entry->fid |= (val & 0x0300) >> 4;
-	}
-
-	return 0;
-}
-
 int mv88e6185_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
 			     struct mv88e6xxx_vtu_entry *entry)
 {
@@ -389,7 +356,7 @@ int mv88e6185_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
 			return err;
 
 		/* VTU DBNum[3:0] are located in VTU Operation 3:0
-		 * VTU DBNum[7:4] are located in VTU Operation 11:8
+		 * VTU DBNum[7:4] ([5:4] for 6250) are located in VTU Operation 11:8 (9:8)
 		 */
 		err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_OP, &val);
 		if (err)
@@ -397,6 +364,7 @@ int mv88e6185_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
 
 		entry->fid = val & 0x000f;
 		entry->fid |= (val & 0x0f00) >> 4;
+		entry->fid &= mv88e6xxx_num_databases(chip) - 1;
 	}
 
 	return 0;
@@ -466,35 +434,6 @@ int mv88e6390_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
 	return 0;
 }
 
-int mv88e6250_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
-			       struct mv88e6xxx_vtu_entry *entry)
-{
-	u16 op = MV88E6XXX_G1_VTU_OP_VTU_LOAD_PURGE;
-	int err;
-
-	err = mv88e6xxx_g1_vtu_op_wait(chip);
-	if (err)
-		return err;
-
-	err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
-	if (err)
-		return err;
-
-	if (entry->valid) {
-		err = mv88e6185_g1_vtu_data_write(chip, entry);
-		if (err)
-			return err;
-
-		/* VTU DBNum[3:0] are located in VTU Operation 3:0
-		 * VTU DBNum[5:4] are located in VTU Operation 9:8
-		 */
-		op |= entry->fid & 0x000f;
-		op |= (entry->fid & 0x0030) << 4;
-	}
-
-	return mv88e6xxx_g1_vtu_op(chip, op);
-}
-
 int mv88e6185_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
 			       struct mv88e6xxx_vtu_entry *entry)
 {
@@ -516,6 +455,10 @@ int mv88e6185_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
 
 		/* VTU DBNum[3:0] are located in VTU Operation 3:0
 		 * VTU DBNum[7:4] are located in VTU Operation 11:8
+		 *
+		 * For the 6250/6220, the latter are really [5:4] and
+		 * 9:8, but in those cases bits 7:6 of entry->fid are
+		 * 0 since they have num_databases = 64.
 		 */
 		op |= entry->fid & 0x000f;
 		op |= (entry->fid & 0x00f0) << 4;